* {
	margin: 0;
	padding: 0;
	text-decoration: none;
}

body {
	padding: 20px;
	text-align: center;
}
ul li{
	list-style: none;
}

#list {
	width: 930px;
	margin: 0 auto;
	position:relative;
}

#list li{
	margin: 2px;
	border: 2px solid #fff;
	float: left;
}

#list li img{
	width: 300px;
	height: 200px
}

#list li.active{
	border: 2px dashed red;
}